PNIO_MAINTENANCE_REQUIRED

PROFINET Maintenance Required Alarm

Phoenix Contact · AXC F 1050 Controller

What does PNIO_MAINTENANCE_REQUIRED mean?

This alarm indicates a low-priority maintenance requirement from at least one PROFINET device with an active connection. It suggests that a device needs attention, but not with the immediate urgency of a 'maintenance demanded' alarm. The specific device can be identified using the RALRM diagnostic block.

Common Causes

  • A connected PROFINET device is signaling a low-priority 'maintenance required' alarm.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Utilize the RALRM diagnostic block in the application program to precisely identify the PROFINET device initiating the maintenance required alarm.

  2. 2

    Consult the documentation for the identified PROFINET device to understand the specific cause of the maintenance required alarm.

  3. 3

    Schedule and perform necessary maintenance actions on the identified PROFINET device.

Browse all codes in this manual (9)
Verified technical data. Last updated: March 2026

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Source: Phoenix Contact AXC F 1050 Controller